package com.atguigu.gulimall.cart.controller;

import com.atguigu.gulimall.cart.interceptor.CartInterceptor;
import com.atguigu.gulimall.cart.service.CartService;
import com.atguigu.gulimall.cart.vo.Cart;
import com.atguigu.gulimall.cart.vo.CartItem;
import com.atguigu.gulimall.cart.vo.UserInfoTo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.List;
import java.util.concurrent.ExecutionException;

@Controller
public class CartController {
    @Autowired
    CartService cartService;

    @GetMapping("/currentUserCartItems")
    @ResponseBody
    public List<CartItem> getCurrentUserCartItems(){
        return cartService.getUserCartItems();
    }
    /**
     * 浏览器有一个cookie：
     * user-key：标识用户身份,一个月之后过期
     * 如果第一次使用JD的购物车功能,都会带上一个临时的身份
     * 浏览器以后保存,每次访问都会带上这个cookie
     *
     * 登录,session有
     * 没登陆,按照cookie里面带来的user-key来做
     * 第一次,如果没有临时用户,帮忙创建一个临时用户
     */
    @GetMapping("/cart.html")
    public String cartListPage( Model model) throws ExecutionException, InterruptedException {
        //1、快速得到用户信息,id,user-key
//        UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
//        System.out.println(userInfoTo);
        Cart cart = cartService.getCart();
        model.addAttribute("cart",cart);
        return "cartList";
    }
    /**
     * 添加商品到购物车
     * RedirectAttributes ra
     * ra.addFlashAttribute() 将数据放在session里面可以在页面取出,但是只能取一次
     * ra.addAttribute("skuId",skuId)  将数据放在url中
     *
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId")Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes attributes) throws ExecutionException, InterruptedException {
        cartService.addToCart(skuId,num);
        attributes.addAttribute("skuId",skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }

    /**
     * 跳转到购物车成功页面
     * @return
     */
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId,Model model){
        //重定向到成功页面,再次查询购物车数据即可
        CartItem cartItem = cartService.getCartItem(skuId);
        model.addAttribute("item",cartItem);
        return "success";
    }



    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,@RequestParam("checked") Integer checked){
        cartService.checkItem(skuId,checked);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId,@RequestParam("num")Integer num){
        cartService.changeItemCount(skuId,num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }
    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Integer skuId){
        cartService.deleteCartInfo(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }
}
